Improvement in permutation-locks



tntd u Qtattt T. J. SULLIVAN, or ALeANY, NEW-YORK.

. 1 Letters Patent No. 94,789, dated September 14, 1869.

IMPROVEMENT IN P ERMUTATION-LOCKS.

The Schedule referred to in these Letters Patent and making partlof the same.

To all whom it may concern Be it known that I, T. J. SULLIVAN, of the city of Albany, in the county of' Albany, and State of New York, have invented certainnew and useful Improvements in Combination-Locks; andI do hereby declare that the following is afull and exact description there of, reference being had t0 the accompanying drawings, making part of this specification. y

Figure 1 is a rear elevation of th lock, with the back plate removed, to show the interior.

Figure 2, a similar view: of` a portion of the lock, With the tumblers removed from place.

Figure 3, a vertical section in plane of the spindle.

Figure 4, a View of one of the tumblers.

Like letters of reference indicate corresponding parts in all the ligures.

My invention consists in the arrangement of the lever-work connected with the bolt for throwing it out and in.

In the accompanying drawings- A indicates the casing of the look;

B, the bolt;

H, the spindle;

C, the dog-lever;

D, the tumblers; and v N, the sliding gate that elevates the dog from the notches of the tnuiblers.

To the casing of' the lock is pivoted, at a, a rock-arm, provided with a slot, b, or equivalent, with which eonnects a bearing, c, of the bolt, and at d, the doglever C is pvoted to the rock-arm E.

he pin or bearing c of the bolt, being placed at an intermediate position between the pivot a of the rockshaft, and the pivotd of the dog-lever, the-strain produced in throwing the bolt forward or back, is divided between the points aand d, and a'leverage is obtained whereby much less power is required for operating the parts. And besides, when the dog-leverG is engaged with the cani-head F, it preserves the same parallel position at 'all times,while the bolt is being thrown forward or back, and thus prevents it from being thrown o the cam-pin e, by any sudden action.

'This mean parallel position of the dog-lever at all times, is of very great importance in preserving the connection so that the bolt may be thrown, and is in- The transferring of' thc'strain, also, tothe two points a d, instead of one, produces greater security, and i11- volves greater diliiculty in feeling and ascertaining the position of the tumblcrs.

The cam-head F, and the sleeve G, through which the spindle'H passes, are made in separate pieces, the cam-head having a central opening which slips on over bearing f of the sleeve, and the sleeve G, having pins g g, that iit loosely in holes formed in the cam-head, and thus impart revolving motion tothe cam when the spindle is turned.

-By this arrangement, if the spindle with the sleeve attached is driven in, the sleeve will pass freely through the hollowvbearin g h of` frame I, which is attached to the casing. Thus the tumblers, being on the outside of bearing h, can in no wise be affectedby the driving 'in' of the spindle, which has a clear passage through.

In ordinary locks, the cam-head I and sleeve'G are made in one piece, fast to the spindle, and if the latter is .driven in, the tumblers and other parts must go with it.;

The tumhlers D are constructed in twoY parts, t' k, the first forming the rim, and the latter the centre. The recess or eye fn, in which the centre lits, is cut but half way through the body of the rim, thus leaving the latter solid and entire on one side, while the centre rests flush or slightly sunk on the other, as clearly shown in iig. 3. v

The cent-re is provided with teeth, n. n, which engage with a tooth or cog, o, ofthe rim, to keep it-from turning.

What Iclaim as my inveutio'maud desire to secure by Letters Patent, is-

The combination with the bolt B, and dog-lever C, of the rock-arm E, arranged as described, and operating in the manner and for the purpose specied.

T. J. SULLIVAN.

Witnesses:

J. A. DAVIS, W. J. CREELMAN. 

